US Patent Issued to Sumitomo Chemical on July 21 for "Display device" (Japanese Inventors)

ALEXANDRIA, Va., July 21 -- United States Patent no. 12,690,307, issued on July 21, was assigned to Sumitomo Chemical Co. Ltd. (Tokyo).

"Display device" was invented by Yoshihiro Harada (Osaka, Japan), Yoshifumi Komatsu (Osaka, Japan) and Tomohiro Fukuura (Osaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A display device including a blue light source (A), a wavelength conversion layer (B), and a light absorption layer (C), wherein the wavelength conversion layer (B) has a first wavelength conversion layer (B1) containing a compound (Q1) that absorbs blue and emits red light, and a second wavelength conversion layer (B2) containing a compound (Q2) that absorbs blue and emits green light, and the di...